﻿// ===================================
// <copyright>LogoUI Co.</copyright>
// <author>Vlad Spivak</author>
// <email>mailto:vlads@logoui.co.il</email>
// <created>21/00/10</created>
// <lastedit>21/00/10</lastedit>

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the 'Software'), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
//
// <remarks>Part of this software based on various internet sources, mostly on the works
// of members of Wpf Disciples group http://wpfdisciples.wordpress.com/
// Also project may contain code from the frameworks: 
//        Nito 
//        OpenLightGroup
//        nRoute
// </remarks>
// ====================================================================================//


using System;
using System.Windows.Input;
using System.Linq;
using System.Windows.Interactivity;
using System.Windows.Controls.Primitives;

namespace LogoFX.Infra.Interactivity
{
    /// <summary>
    /// Provides selection change on key input
    /// </summary>
    public class JumpToValueBehavior
        : Behavior<Selector>
    {

        public string JumpToPropertyName { get; set; }
        public bool IsJumpToValueCaseSensitive { get; set; }


        protected override void OnAttached()
        {
            base.OnAttached();

            this.AssociatedObject.TextInput += new TextCompositionEventHandler(AssociatedObject_TextInput);
        }

        void AssociatedObject_TextInput(object sender, TextCompositionEventArgs e)
        {
            //ToDo collect keystrokes and combine them to allow for multiple letters
            if (!string.IsNullOrEmpty(this.JumpToPropertyName))
            {
                string keyValue = e.Text;

                if (!string.IsNullOrEmpty(keyValue))
                {

                    var items = from object i in this.AssociatedObject.Items
                                where i != null && CompareJumpToValue(i.GetType()
                                    .GetProperty(this.JumpToPropertyName)
                                    .GetValue(i, null).ToString(), keyValue)
                                select i;

                    object firstItem = items.FirstOrDefault();

                    if (firstItem != null)
                    {
                        this.AssociatedObject.SelectedItem = firstItem;
                    }


                }

                e.Handled = true;
            }
        }

        protected override void OnDetaching()
        {
            base.OnDetaching();

            this.AssociatedObject.TextInput -= AssociatedObject_TextInput;

        }

        protected bool CompareJumpToValue(string itemValue, string textInput)
        {

            bool result = false;

            if (this.IsJumpToValueCaseSensitive)
            {
                result = itemValue.StartsWith(textInput, StringComparison.InvariantCulture);
            }
            else
            {
                result = itemValue.StartsWith(textInput, StringComparison.OrdinalIgnoreCase);
            }


            return result;
        }
    }
}
